CPB Ljubljana 2018 course book

The Cumulative Dose Volume Histogram (CDVH): implant

Volume/ % dose

DOSE NON-UNIFORMITY RATIO (DNR) ratio of the high dose volume (1.5 times PD) to the reference dose volume. V150/V100 The optimal dose distribution in terms of dose uniformity can be achieved at the minimum DNR value.

V150/V100 = 0.19

An implant with rigid needles and templates shows a very high homogeneity. High doses per fraction can be chosen